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alexgriva [62]
3 years ago
15

Help me with 15 16 17 and 18 please thank you so much

Chemistry
2 answers:
Oksana_A [137]3 years ago
4 0
15.c
16.the law of conservation of mass state that mass in a isolated system is niether created or destroyed.
17.you can prove that dissolving salt is a physical change by evaporating the water to separate the two.
klemol [59]3 years ago
3 0
I Know 15. Answer Is D.
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A dialysis unit requires 70000 mL of distilled water. How many gallons of water are needed? (1 gal = 4 qt)
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Now if 4 quarts is equal to 1 gallon.

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